Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Sunday, 22 June 2025

‹ 21.06.2025 2025 23.06.2025 ›

Photosphere sunspot drawing and RDS evaluation

22.06.2025 photosphere drawing

High-resolution scan (3229 px)

Time
07:35 UT
Observer
Süleyman FİŞEK
g
8
f
37
R
117
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 1Group 1 · AX_ – 1 Group 2 · HS_ – 2Group 2 · HS_ – 2 Group 3 · CSO – 4Group 3 · CSO – 4 Group 4 · AX_ – 1Group 4 · AX_ – 1 Group 5 · ?__ – 7Group 5 · ?__ – 7 Group 6 · DKC – 9Group 6 · DKC – 9 Group 7 · AX_ – 1Group 7 · AX_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=22.06.2025
Saat=07:35
Gözlemci=Süleyman FİŞEK
KontrolEden=Korhan YELKENCİ
Durumaçısı=-6.51
Enlemaçısı=1.88
Boylamaçısı=322.89
Boylamfark=2
GKalite=3
GDurum=B.A , K.T
Kuzeyaçısı=-0.5
Sırano=20278
AyRasatNo=21
RasatÖnceki=21.06.2025
RasatSonraki=23.06.2025

[Leke Grupları]
Grupsayısı=8:3:5
LekeSayısı=37:7:30
RölatifSayı=117:37:80
01=AX_ 01 +16.241 +75.696 038.586 +0.000 0000 0 +16.595 +76.686 +15.886 +74.705 +16.241 +76.187 +16.241 +75.205
02=HS_ 02 +19.525 +63.218 026.108 -1.000 0000 0 +21.120 +65.127 +17.929 +61.308
03=CSO 04 +21.413 +52.514 015.404 13.194 0000 0 +23.905 +60.805 +18.921 +44.224 +19.801 +56.893 +22.384 +45.802
04=AX_ 01 -11.844 +72.499 035.389 +0.000 0000 0 -11.439 +73.347 -12.249 +71.651 -11.844 +72.847 -11.844 +72.151
05=?__ 07 -11.155 -20.988 301.902 -1.000 0000 0 -10.240 -19.416 -12.286 -22.559
06=DKC 09 -14.646 -22.241 300.649 +0.000 0000 0 -13.199 -18.409 -16.920 -26.720 -14.646 -18.609 -14.646 -25.872
07=AX_ 01 -25.558 -23.628 299.262 -1.000 0000 0 -25.558 -23.628 -25.558 -23.628
08=DKC 12 -11.528 -32.347 290.543 +0.000 0000 0 -09.473 -36.113 -13.584 -28.581 -11.528 -28.781 -11.528 -35.913
20250622.gzd

Chromosphere (H-α) FITS frames

H-α

The images are made automatically with a fixed, gentle rule: uneven illumination and most of the limb darkening are removed, and the brightness is shown on a linear scale (no sharpening); prominences get their own scale outside the limb. Frames are ordered by sharpness (seeing); frames without the Sun (darks, bias) come last. Method →

2025/20250622_sf · SF · 6 frames · 128.6 MB · 08:00:51–08:03:50 UT

08:01:51 UT · 3 ms 08:02:51 UT · 3 ms 08:03:20 UT · 6 ms 08:03:50 UT · 3 ms 08:02:21 UT · 6 ms 08:00:51 UT · 6 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.